Furnace



Nov. 2 1926. 1,605,218

W. D. CRITES FURNACE Filed April 17. 1925 #iZlO/F/ TES.

Patented Nov. 2, 1926.

UNIITEDSTATEIS PAT-Eur WILLIAM D. CRITESyOF DULUTH, MINNESOTA;

FURNACE.

Application filed Apri11'7, 1925. Serial 110.23,?50.

by a portion of the return. water is brought Io into more direct contactwith the heating element than in the ordinary furnace or Water heater ofthis type.

Other objects and advantages of the invention will appear in the furtherdescription thereof.

Referring now to the accompanying drawing, forming part of thisapplication, and in which like reference characters indicate like parts:

Figure 1 is a central vertical section through a water heating furnaceembodying the invention, and

Figure 2 is a plan view of one of the hol- Ion sections of the furnace.

1 represents the lower body portion of a hollow cylindrical furnacemounted upon a suitable base 2 and carrying a plurality of hollow disklike sections 3, 4, and 5 terminating in the hollow top section 6. Thesesections 3, 4, 5, and 6 are securely held together by any desired numberof through bolts 7, as is common in furnaces of this type.

In the cylindrical chamber 8 of the body portion 1 is mounted a chamberor dome 9 having preferably a concaved bottom 10 therein which issupported upon preferably four upstanding pipes 11, screw threadedlymounted in the openings 12 in the bottom of the section 1. The returnpipes for the furnace are illustrated at 13, they communicating with theinterior of the body portion 1 at the base thereof, so that part of thewater returning in the pipes 13 is diverted in the dome 9 and throughsame upwardly in the axially disposed pipe 14 to the discharge pipe 15of the furnace.

A comparatively large axial hole oropening 16 is formed in the bottom ofthe body section 1 upwardly in which is installed the gas burner 17, thesame entering through a similar lateral opening 18 in the base 2, theseopenings being sufficiently large to permit of ample air circulation forthe desired combustion of gas within the furnace.

The sections 3, 4, 5, and 6 are united in the usual way by the watercirculating tapered thimbles 19, and the section 3 vided with onearcuately shapedsmoke pas sage .20 spaced about midway. one side and thecenter thereof,while'the section el-"is also provided with a similaropeningbut at the opposite side of the center, so that the prod-- uctsof combustion will be obliged to pass firstthrough the opening 20,thence horizontally through the passageway 21' and upwardly through theopening 22 in the section 4. The section 5 is provided with two likeopenings 23 and 24, the former being either directly or approximatelyover the opening 22 in the section 4, thus necessitating the products ofcombustion to pass prac tically directly through the openings 22 and 23into the horizontal passageway 25 through which it passes to and throughthe opening 24, downwardly into the horizontal passage 26 and thenceoutwardly into the flue 27, the interlocking flanges of the sections 4and 5 being cut away at this point to form a continuation of thepassageway 26 into the discharge flue or chimney 27. In order to preventthe smoke or products of combustion from passing directly from thepassageway 22 through the passageway 26 to the chimney I provide afiller block or baffle 28 transverse the furnacebetween the sections -4and 5, thus causing the circulation as previously described.

Pipes 29 are shown as communicating with the interior of the section 6of the furnace and the discharge pipe 15 which may .lead to any form ofradiating means desired as is obvious.

From the foregoing it is evident that my invention principally residesin the providing of an auxiliary heating dome within a somewhat ordinaryfurnace, though the particular arrangement of the latter for suchinstallation is novel, and, having thus described my invention, what Iclaim and desire to secure by Letters Patent, is:

1. The combination wit-h a water heating furnace including a hollowwalled main water heating section forming a hollow receptacle and havinga horizontally disposed hollow bottom having an axial opening therein,of an auxiliary water heating chamber within the hollow receptacle, aburner within the receptacle between the bottom thereof and theauxiliary chamber, and a supply for said burner entering through saidaxial opening.

is pro- 1 2. A furnace of the type described comprising an upright,hollow walled, cylindrical, body portion forming a hollow receptacle,carrying a plurality of hollow water heating sections communicating witheach other and the body portion, said body por tion having ahorizontally disposed hollow bottom with an axial opening therethrough,an upright gas burner installed within the interior of the body portionthrough said opening, a dome like chamber within the body portion abovethe gas burner, intake and, discharge pipes for said furnace, intakepipes for said dome communicating with the interior of the body portion,and an axially disposed discharge pipe for said dome passing through thefurnace and communicating with the discharge pipes thereof.

3. The combination with a water heating furnace including a main waterheating section and a plurality of superposed intercommunicating waterheating sections communieating with the main section, of a horizontallydisposed hollow water heating bottom for said main section having anaxial opening therethrough, an auxiliary water heating chamber suspendedwithin the main section and communicating with the bottom thereof, aburner within the main section between the bottom thereof and theauxiliary chamber, and a supply for said burner entering through saidaxial opening.

In testimony whereof I hereunto ailix my signature.

WILLIAM D. CRITES.

